import type { IRaceRepository } from '../../domain/repositories/IRaceRepository';
import type { AsyncUseCase } from '@gridpilot/shared/application';

/**
 * Use Case: CancelRaceUseCase
 *
 * Encapsulates the workflow for cancelling a race:
 * - loads the race by id
 * - throws if the race does not exist
 * - delegates cancellation rules to the Race domain entity
 * - persists the updated race via the repository.
 */
export interface CancelRaceCommandDTO {
  raceId: string;
}

export class CancelRaceUseCase
  implements AsyncUseCase<CancelRaceCommandDTO, void> {
  constructor(
    private readonly raceRepository: IRaceRepository,
  ) {}

  async execute(command: CancelRaceCommandDTO): Promise<void> {
    const { raceId } = command;

    const race = await this.raceRepository.findById(raceId);
    if (!race) {
      throw new Error('Race not found');
    }

    const cancelledRace = race.cancel();
    await this.raceRepository.update(cancelledRace);
  }
}